Ruling · Śiva Śayanotsava · 1910

Thursday 21 July

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 182 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Thursday 21 July

Taken. The only evening Pūrṇimā reaches.

19:39 sunsetpradoṣa ends 20:55
19:1519:3920:0320:2720:5121:1521:39

76 of 76 minutes covered

Evening of Friday 22 July

Pūrṇimā is absent from pradoṣa. Not taken.

19:39 sunsetpradoṣa ends 20:55
19:1519:3920:0320:2720:5121:1521:39

0 of 76 minutes covered

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 16:33 on Thu 21 Jul to 16:37 on Fri 22 Jul.

    1910-07-21T08:32:34Z → 1910-07-22T08:36:40Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 19:39–20:55 on the 21st, 19:39–20:55 on the 22nd.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 76 of 76 minutes on the 21st and 0 of 76 on the 22nd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 10923 s

  5. 05

    Ruling

    Śiva Śayanotsava, Baoding, 1910: Thursday 21 July.

    confidence: determinate

Say it like this

In Baoding, Śiva Śayanotsava 1910 falls on Thursday 21 July. Pūrṇimā runs from 16:33 on Thu 21 Jul to 16:37 on Fri 22 Jul and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1910/shiva-shayanotsava · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 21 Jul
Ahargaṇa, classicalDisc centre, no refractionThu 21 Jul
compat-drikpanchangComparison profileThu 21 Jul
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/shiva-shayanotsava · ruleset 2026.3-draft

Month
Āṣāḍha, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 102

“S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāSunset 21stCoveredSunset 22ndCoveredRuled
Los Angeles00:33 → 00:3719:0279 min19:010 min21 Jul
Chicago02:33 → 02:3719:2074 min19:190 min21 Jul
Jersey City03:33 → 03:3719:2275 min19:220 min21 Jul
Port of Spain04:33 → 04:3718:3291 min18:320 min21 Jul
London08:33 → 08:3720:0564 min20:040 min21 Jul
Durban10:33 → 10:3717:16108 min17:170 min21 Jul
Dubai12:14 → 12:1818:5084 min18:500 min21 Jul
Delhi14:03 → 14:0719:1982 min19:180 min21 Jul
Kolkata14:03 → 14:0718:2285 min18:220 min21 Jul
Singapore15:33 → 15:3718:1695 min18:160 min21 Jul
Sydney18:33 → 18:3717:0725 min17:0889 min22 Jul
Suva20:28 → 20:3217:430 min17:43103 min22 Jul
Profile · tradition
pac-rp@2026.1 · smarta
Rule
shiva-shayanotsava@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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